When you swallow, the epiglottis prevents __________.
food or liquid from entering your airway
dust and bacteria from entering your airway
carbon dioxide from entering your lungs
air from entering your lungs
What is the function of cilia that line the nasal cavity?
trap dust from the air
moisten the air taken in
sweep away mucus and trapped materials
produce sticky mucus
The __________ is a tubelike passageway used by food, liquid, and air.
Which one of the following is the correct pathway of air after it enters the nasal passages?
pharynx, larynx, trachea, bronchi, lungs
larynx, pharynx, bronchi, trachea, lungs
lungs, bronchi, trachea, larynx, pharynx
larynx, trachea, pharynx, bronchi, lungs
The exchange of oxygen and carbon dioxide in the lungs takes place between the __________.
alveoli and capillaries
bronchi and bronchioles
nostrils and lungs
pharynx and lungs
What muscle contracts and relaxes when you inhale and exhale?
Which one of the following is a disease of the respiratory system in which alveoli in the lungs enlarge?
Inhaling the tar in __________ is the greatest contributing factor to lung cancer.
Which one of the following is a lung disorder that occurs when the bronchial tubes contract quickly?
Which one of the following is a disease in which some of the aveoli of the lungs fill with fluid so they can not longer exchange gas?